package com.example.common;

import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.view.MotionEvent;
import android.widget.TextView;

/**
 * 解决与长按同时触发的问题
 */
public class LinkMovementClickMethod extends LinkMovementMethod {

    private long lastClickTime;

    private static final long CLICK_DELAY = 500L;

    @Override
    public boolean onTouchEvent(TextView widget, Spannable buffer,
                                MotionEvent event) {
        int action = event.getAction();

        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);

            ClickableSpan[] links = buffer.getSpans(off, off, ClickableSpan.class);

            if (links.length != 0) {
                ClickableSpan link = links[0];
                //============================修改的部分==============================
                if (action == MotionEvent.ACTION_UP) {
                    if (System.currentTimeMillis() - lastClickTime < CLICK_DELAY) {//短按则处理，否则会与长按同时触发
                        link.onClick(widget);
                    }

                } else if (action == MotionEvent.ACTION_DOWN) {
                    Selection.setSelection(buffer,
                            buffer.getSpanStart(link),
                            buffer.getSpanEnd(link));
                    lastClickTime = System.currentTimeMillis();
                }
                //============================修改的部分==============================
                return true;
            } else {
                Selection.removeSelection(buffer);
            }
        }

        return super.onTouchEvent(widget, buffer, event);
    }

    public static LinkMovementClickMethod getInstance() {
        if (null == sInstance) {
            sInstance = new LinkMovementClickMethod();
        }
        return sInstance;
    }

    private static LinkMovementClickMethod sInstance;

}